Fujitsu AB F18LAT Series Service Instruction page 48

Trouble shooting 14
OUTDOOR UNIT Error Method:
IPM error (Permanent Stop)
Detective Actuators:
Outdoor Unit Main PCB Circuit
Compressor
Forecast of Cause :
1. Defective connection of electric components 2. Outdoor Fan Operation failure
3. Outdoor Heat Exchanger clogged
Check Point 1 : Check connections of Outdoor Unit Electrical Components
Check if
the terminal connection
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
OK
Check Point 2 : Check Outdoor Fan, Heat Exchanger
Is there anything obstructing the air distribution circuit?
Is there any clogging of Outdoor Heat Exchanger?
Is the Fan rotating by hand when operation is off ?
>> If the Fan Motor is locked, replace it.
OK
Check Point 3 : Check Outdoor Fan
Check Outdoor Fan Motor. (Refer to Trouble shooting 17)
>> If the Fan Motor is failure, replace it.
OK OK
Check Point 4 : Check Compressor
Check Compressor. (PARTS INFORMATION 2)
OK OK
Check Point 5 : Replace Main PCB
If Check Point 1 4 do not improve the symptom, change Main PCB.
Indicate or Display:
Outdoor Unit : LED 0.5sec ON/ 0.5sec OFF
ERROR CODE : E : 17
Detective details:
When more than normal operating current to IPM in Main PCB flows,
the compressor stops.
After the compressor restarts, if the same operation is repeated within 40sec,
the compressor stops again.
If and
is loose.
repeats 5 times, the compressor stops permanently.
4. Compressor failure
02-17
5. Main PCB failure